Arghhhhhhh! pleeez help some body!

I got cool edit pro 2.1, been working kinda ok for about two months. I recently hook up a bit of hardwear (mpc200xl) to record x8 into my terratec sound card,

I keep getting "glitches" in my recordings! I read the manual and changed the latency setting in the cards control panel and it seemed to sort out the problem but, the damn thing started doing it again last night and any thing I change on the control panel doesn't do a thing or make it slightly worse!

do I have a deeper problem here than just a configuration problem?